Patent US5010743A successfully refreshed from Google Patents.
Patent US2739160A successfully refreshed from Google Patents.
US2739160A
Expired / Lapsed
US
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Bis-glycidyl ethers of hindered dihydroxybenzenes and process for their manufacture
Assignee: Eastman Kodak Co
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Filing: 1952-10-01
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Granted: 1956-03-20
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Expires: 1972-10-01
Abstract
No abstract record available.
Inventors
- 👤 Bell Alan
- 👤 Wayne V Mcconnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1515; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
A PROCESS OF PREPARING A BIS-GLYCIDYL ETHER OF A SUBSTITUTED DIHYDROXYBENZENE IN WHICH A SUBSTITUENT GROUP EXERTS STERIC HINDRANCE OF AT LEAST ONE HYDROXY GROUP WHICH COMPRISES REACTING A DI-ALKALI-METAL SALT OF THE SUBSTITUTED DIHYDROXYBENZENE WITH EPICHLOROHYDRIN IN THE PRESENCE OF EXCESS EPICHLOROHYDRIN, IN THE ABSENCE OF WATER.
Claim 2
Dependent Claim
48 words
A PROCESS OF PREPARING A BIS-GLYCIDYL ETHER OF A SUBSTITUTED DIHYDROXYBENZENE IN WHICH A SUBSTITUENT GROUP EXERTS STERIC HINDRANCE OF AT LEAST ONE HYDROXY GROUP WHICH COMPRISES REACTING A DI-ALKALI-METAL SALT OF THE SUBSTITUTED DIHYDROXYBENZENE WITH EPICHLOROHYDRIN IN THE PRESENCE OF EXCESS EPICHLOROHYDRIN, IN THE ABSENCE OF WATER.
Claim 3
Dependent Claim
23 words
A BUS-GLYCIDYL ETHER OF A SUBSTITUTED HYDROQUINONE SELECTED FROM THE GROUP CONSISTING OF TERTIARY BUTYL HYDROQUINONE, (1,1,3,3-TETRAMETHYLBUTYL) HYDROQUINONE, PHENYL HYDROQUINONE, AND D-TERTIARY-BUTYL HYDROQUINONE.
Claim 4
Dependent Claim
23 words
A BUS-GLYCIDYL ETHER OF A SUBSTITUTED HYDROQUINONE SELECTED FROM THE GROUP CONSISTING OF TERTIARY BUTYL HYDROQUINONE, (1,1,3,3-TETRAMETHYLBUTYL) HYDROQUINONE, PHENYL HYDROQUINONE, AND D-TERTIARY-BUTYL HYDROQUINONE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |